I download TV shows using bittorrent, but after I watch them and want to delete them from my download folder, they don't move to the recycle bin. It seems to be mostly mkv files that I can't delete. What can I do?

In some cases it does, but I'll remove it from the torrent client, and try and I'll get what I get in the pic I posted. In that pic it doesn't tell me its being used by another program, it just does what I posted and does nothing, I could leave it like that for like half hour and nothing changes.

Turn off the preview pane. I am tech support where I work and one guy has Windows 8 and called me every day for a week trying to delete things. turns out preview pane was holding onto a lock on the files that prevented deletion. I have never used it so I didn't think to check for it. I can't say for certain that it will fix your issue but it's a place to start.